Method and system for pattern correction of borehole images through image filtering

A system, comprising:

• a downhole tool in a wellbore of a geological formation;
• and
• a data processing system comprising a processor configured to:
• obtain a borehole image deriving from the downhole tool, wherein the borehole image includes one or more artifacts;
• generate a filtered image that substantially removes or reduces the one or more artifacts from the borehole image at least partially by:
• determining a location of the one or more artifacts and a zone where
• the one or more artifacts occur in the borehole image;
• converting the borehole image to frequency domain data;
• applying a multi-parameter filter to the frequency domain data to substantially remove or reduce the one or more artifacts;
• and
• transform the frequency domain data to spatial domain data;
• and
• output the filtered image based at least in part on the spatial domain data.

A tangible, non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to:

• obtain a borehole image deriving from the downhole tool, wherein the borehole image includes one or more artifacts;
• generate a filtered image that substantially removes or reduces the one or more artifacts from the borehole image using at least a multi-parameter notch filter, wherein a first parameter of the multi-parameter notch filter relates to a bandwidth in a depth direction and a second parameter of the multi-parameter notch filter relates to a bandwidth in an azimuthal direction, and the first parameter, the second parameter, or both are automatically adapted in the multi-parameter notch filter based on the one or more artifacts;
• and
• output the filtered image based at least in part on the spatial domain data.